RAG Guide: Include python-dotenv to load Cohere and Pinecone API keys from .env file

[rossdanlm]

RAG Guide: Include python-dotenv to load Cohere and Pinecone API keys from .env file

Nice convenience function, don't need to acecpt if you don't like it

Test Plan

Notebook runs if you define API keys in an .env file

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• RAG Guide: Wrap individually chatbot query run into a helper function #162
• RAG Guide: Comment out set_css logic that breaks for Jupyter notebooks #161
• -> RAG Guide: Include python-dotenv to load Cohere and Pinecone API keys from .env file #160

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[mrmer1]

@rossdanlm Thank you, yes let's add this.